Oldest surviving tombstone in Central Florida?

Consider this post a challenge to ye local socks to find a tombstone in this little corner of heaven that predates the one I found outside the Marsh Museum in Tomoka State Park (Volusia County).

Evidently, the stone was vandalized during the Second Seminole War and removed from the grave site (just a mile or so away from its current location). By the time the State of Florida acquired it (how, I do not know), it was broken in two pieces.

I've done a lot of cemetery surveys around here, but have never seen a stone this old (1825) south of St. Augustine. Anyone up for the challenge of beating that date?

Kinda hard to read, so here's a transcript:

Sacred to the memory

of

John Addison

who died at his plantation on the Tomoka River,

East Florida,

on the 29th day of June, 1825,

after a sickness of four days,

aged 61 years and 6 months.

He was born in Carrickfergus, County

Antrim, Ireland.

Early in life, he visited the United States

and the West Indies, but for many years

[crack in stone]

he died, and by his industry acquired a

very handsome property.

He was indeed a humane master,

a benevolent friend, and a most

affectionate brother.

This stone is erected as a small token

of respect to his memory by his brother

Thomas Addison

and his other relatives.